Prince William and his wife Kate have left the hospital with their newborn son on Monday, less than seven hours after his birth.
The couple got into a car with the baby boy as they smiled and waved to the public outside of the hospital.
Kate gave birth to a son at 11 am, according to a statement by Kensington Palace.
The Duke of Cambridge, William, was present for the birth.
The baby is fifth in the line to succession.
Her husband, Prince William, is second in line to the British throne and the couple has two other children, George, 4, and Charlotte, who will celebrate her third birthday next week.
Earlier on Monday morning, she was accompanied by the Duke of Cambridge as they travelled by car to the St Mary's Hospital in west London where she gave birth to her first two children.
The name of the baby will be announced in due course, said the statement.